#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>

void Swap_2(int* pa, int* pb)
{
	int temp = *pa;
	*pa = *pb;
	*pb = temp;
}
int main()
{
	int a = 10;
	int b = 20;
	Swap_2(&a, &b);
	printf("%d\n", a);
	printf("%d\n", b);
	return 0;
}